| Year | 1927 |
| Date | 10-Nov |
| Volume | 57 |
| Issue | 1,383 |
| Page | 440 |
| Category | Internal Combustion |
| Part | 3 |
| Title | Some Notes on the Design of Small Petrol Engines |
| Author | J.Harrison |
| Notes | Hemispherical head, compression ratio, vertical overhead valve arrangement, what is compression ration? Combustion chamber design, Ricardo side-by-side valve cylinder head, badly shaped cylinder head, the limitations of fuel, service and design |